CVE-2026-36669

CRITICAL

Feng Office 3.11.13.11 - Unauthenticated Arbitrary File Upload via ck_upload_handler.php

Title source: llm

Description

An unauthenticated arbitrary file upload vulnerability in ck_upload_handler.php in Feng Office 3.11.13.11 allows remote attackers to upload malicious files (such as .html) to the web-accessible /tmp/ directory.

References (2)

Core 2

Core References

https://www.fengoffice.com/

https://github.com/firstlax6t/CVE-2026-36669-FengOffice

View Exploit ZIP pw:eip

Scores

CVSS v3 9.8

EPSS 0.0056

EPSS Percentile 43.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-434

Status published

Published Jul 17, 2026

Tracked Since Jul 18, 2026